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Old 14th July 2004, 08:25 PM   #1
rif is offline rif  United States
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Default Think these are useful -- huge xformer?!

Stumbled into this on ebay.

http://cgi.ebay.com/ws/eBayISAPI.dll...826720178&rd=1

I'm in no way affiliated, just curious if I should bid on a pair.
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Old 14th July 2004, 09:10 PM   #2
sam9 is offline sam9  United States
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Yes . .. I think . . .

There is no reason I can think of a 208V primary cannot run off 115-125V mains. That would get you + & - 60-65Vac out of the secondary. Even if there is no center tap on the secondary there are ways to create a 0V point when the rest of the PS is built. the resulting DC rails would be approximately 85V. This in turn would be about right for a 400-450W amp. The VA rating od 1.9VA would be ample for two channels even with ohm loads although a contiuoues max power sine into 4-ohms might be pushing it.

Anyway, it is good for something if one if up to the challenge. I'm not but others here are.
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Old 14th July 2004, 11:02 PM   #3
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Hell I just purchased two, I mean c'mon for $20 how can you go wrong?

Now watch the shipping be $600. EEEEEK!
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Old 14th July 2004, 11:04 PM   #4
sam9 is offline sam9  United States
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If you can't make an amp from them, at least you have some unique door stops.
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Old 14th July 2004, 11:25 PM   #5
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Thanks rif!

I'm only eight miles away from them and I ALWAYS need spare doorstops here at the shop. I think I'll jump on it.

-Casey Walsh
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Old 15th July 2004, 12:58 AM   #6
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WOW... all 30+ transformers are gone already.

I thought about them over dinner and considered picking up a few more and some of the 625VA ones he had but I guess when you snooze you lose!
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Old 15th July 2004, 03:43 AM   #7
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Not to fret. I think he's got a bunch of 'em. I noticed he has listed these frequently in the past. If I snagged the last of them I can set you up with a few of each for what I paid ($10 each) plus UPS ground shipping. We DIYers gotta stick together.


-Casey Walsh
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Old 15th July 2004, 03:59 AM   #8
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Quote:
Originally posted by SmarmyDog
Not to fret. I think he's got a bunch of 'em. I noticed he has listed these frequently in the past. If I snagged the last of them I can set you up with a few of each for what I paid ($10 each) plus UPS ground shipping. We DIYers gotta stick together.


-Casey Walsh

Ahhhh a friend with parts is a friend indeed!
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Old 15th July 2004, 05:19 AM   #9
Mr Teal is offline Mr Teal  Canada
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I bought two of these montrosities a few weeks ago. They aren't here yet so I can't test the voltages, but I'm planning on using two of them for a beastly +/- 90V, 2 ohm stable version of Rod Elliot's P68. I figure that should power a 2x6 cab nicely.
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Old 16th July 2004, 12:37 AM   #10
Mr Teal is offline Mr Teal  Canada
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What a coincidence, I just got them today. These things weigh a tonne. NL voltage is 69.5VAC when hooked to 115VAC. Did I mention these weigh a tonne? Here's some pics...

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